i need más advice...

I would ignore them and stick ur tongue at out at them. Sorry im rly immature xD

If they say 'here comes ugly' all tu need to say is, 'well obviously i'm not that bad as tu can't see yourself' o 'looking in the mirror again are you?'
Short, snappy responses will put them off their guard.

Also i would go speak to a teacher o the headmistress/master o a peer tu trust and get their advice. Ask them to make the bullying stop.
If they don't and tu feel your life is threatened, physically o mentally, then i should start escritura everything the bullies say and do to tu in a booklet. Once you've got enough, go to the police and file for a restaining order, then go get a solictitor (lawyer) and see if tu have any grounds to sue your school for negligence.

Stare them in the eye with a blank face for long periods of time, it'll creep them out.

Dont get mad coz you'll be giving them the satisfaction.just toss your hair-and if i were tu i'd be tempted to add on that they arent exactly goddesses themselves-trust me,showing them tu dont care takes the thrill out of the whole USA bit and they'll stop.